MCQOPTIONS
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MCQOPTIONS
This section includes 120 Mcqs, each offering curated multiple-choice questions to sharpen your AIIMS MBBS knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
The colour in the brown fat is due is |
| A. | its larger capacity for generating heat |
| B. | large number of mitochondria present |
| C. | a high concentration of iron containing cytochrome pigments |
| D. | presence of chromatophores |
| Answer» D. presence of chromatophores | |
| 52. |
At a particular locus, frequency of ‘A’ allele is 0.6 and that of ‘a’ is 0.4. What would be the frequency of heterozygotes in a randomly mating population of equilibrium? |
| A. | 0.16 |
| B. | 0.36 |
| C. | 0.48 |
| D. | 0.24 |
| Answer» D. 0.24 | |
| 53. |
Censar mechanism of seed dispersal is found in |
| A. | Papaveraceae |
| B. | Liliaceae |
| C. | Leguminosae |
| D. | Rosaceae |
| Answer» B. Liliaceae | |
| 54. |
In an area, a population with large size individuals having long life span, more parental care and slow development was present. The type of population growth curve will be |
| A. | S-shaped |
| B. | J-shaped |
| C. | Z-shaped |
| D. | All of these |
| Answer» B. J-shaped | |
| 55. |
What is not a common feature is Periplaneta and Scorpions? |
| A. | Excretory organs are malpighian tubules |
| B. | No appendages in abdomen |
| C. | Respiratory organs are trachea |
| D. | Both are mostly terrestrial arthropods |
| Answer» D. Both are mostly terrestrial arthropods | |
| 56. |
The species diversity decreases from lower to higher altitudes on a mountain. This is due to |
| A. | increase in temperature |
| B. | decrease in temperature |
| C. | greater seasonal variability |
| D. | Both (b) and (c) |
| Answer» E. | |
| 57. |
‘Cladode’s is a characteristic morphological feature of |
| A. | Asparagus and Ruscus |
| B. | Casuarina and Opuntia |
| C. | Cladophora and Cactus |
| D. | Citrus and Euphorbia |
| Answer» B. Casuarina and Opuntia | |
| 58. |
Which one is matched correctly? |
| A. | Arsenic―Black foot disease |
| B. | Flouride―Itai-itai |
| C. | Mercury―Skeletal fluorosis |
| D. | Cadmium―Minamata disease |
| Answer» B. Flouride―Itai-itai | |
| 59. |
Atretic follicles are found in the |
| A. | fallopian tubes |
| B. | uterus |
| C. | labia majora |
| D. | ovary |
| Answer» E. | |
| 60. |
Osmosis is a type of |
| A. | imbibitions of solution |
| B. | diffusion of solvent |
| C. | evaporation of water |
| D. | diffusion of solute |
| Answer» C. evaporation of water | |
| 61. |
Which of the following is a ‘cyanophage’? |
| A. | S-13 |
| B. | ϕ × 174 |
| C. | SV-40 |
| D. | LPP-1 |
| Answer» E. | |
| 62. |
The brain disease caused due to accumulation of amyloid β-peptide is |
| A. | Addison’s disease |
| B. | Huntington’s disease |
| C. | Parkinson’s disease |
| D. | Alzheimer’disease |
| Answer» E. | |
| 63. |
A drug addict showed symptoms such as increased appetite, chest pain, redness of eyes, increased urination. He was possibility taking |
| A. | cannabis compounds |
| B. | LSD |
| C. | cocaine |
| D. | amphetamines |
| Answer» B. LSD | |
| 64. |
Which one of the following shows heterothallism? |
| A. | Rhizopus |
| B. | Bacterium |
| C. | Cycas |
| D. | Ricinus |
| Answer» B. Bacterium | |
| 65. |
Hypothetical plant hormones are |
| A. | florigen |
| B. | vernalin |
| C. | florigen and vernalin |
| D. | auxin |
| Answer» D. auxin | |
| 66. |
Which one of the following correctly describes the location of some body parts in the earthworm (Pheretima)? |
| A. | Four pairs of spermathecae in 4-7 segments |
| B. | One pair of ovaries attached at inter-segmental septum of 14th and 15th segments |
| C. | Two pairs of testes in 10th and 11th segments |
| D. | Two pairs of accessory glands in 16-18th segments |
| Answer» D. Two pairs of accessory glands in 16-18th segments | |
| 67. |
Aerobic respiration produces more usable chemical energy than fermentation, because fermentation involves |
| A. | formation of lactic acid |
| B. | complete oxidation of food |
| C. | partial oxidation of food |
| D. | evolution of CO2 and alcohol |
| Answer» D. evolution of CO2 and alcohol | |
| 68. |
There is increase in blood urea when there is insufficient filtration in |
| A. | loop of Henle |
| B. | distal tubule |
| C. | Bowman’s capsule |
| D. | collecting tubule |
| Answer» D. collecting tubule | |
| 69. |
ABA is involved in |
| A. | shoot elongation |
| B. | increased cell division |
| C. | dormancy clock |
| D. | root elongation |
| Answer» D. root elongation | |
| 70. |
A physiological response of plants to the duration of light and darkness is a |
| A. | daily phase cycle |
| B. | circadian rhythms |
| C. | biological clock |
| D. | photoperiodism |
| Answer» E. | |
| 71. |
‘Red tide’ is caused by |
| A. | Gonyaulax |
| B. | Ceratium |
| C. | Taceratium |
| D. | All of these |
| Answer» E. | |
| 72. |
Phylogenetic system of classification includes |
| A. | evolutionary trends only |
| B. | genetic trends only |
| C. | evolutionary trend as well as morphology |
| D. | behvarioural trends in environment |
| Answer» B. genetic trends only | |
| 73. |
Gelatin, an important raw material for preparation of photographic emulsion is a by product of |
| A. | chicken |
| B. | forest |
| C. | cattle |
| D. | fish |
| Answer» D. fish | |
| 74. |
Wings a pigeon, bat and mosquito shows |
| A. | atavism |
| B. | convergent evolution |
| C. | divergent evolution |
| D. | mutation |
| Answer» C. divergent evolution | |
| 75. |
Assertion The purple colour of KMnO4 is due to the charge transfer transition. Reason The intense colour in most of the transition metal complexes is due to d-d transition. |
| A. | Both Assertion and Reason are true and Reason is the correct explanation of Assertion |
| B. | Both Assertion and Reason are true and Reason is not the correct explanation of Assertion |
| C. | Assertion is true but Reason is false |
| D. | Both Assertion and Reason are false |
| Answer» C. Assertion is true but Reason is false | |
| 76. |
Assertion Boron always forms covalent bond. Reason The small size of B3+ favours formation of covalent bond. |
| A. | Both Assertion and Reason are true and Reason is the correct explanation of Assertion |
| B. | Both Assertion and Reason are true and Reason is not the correct explanation of Assertion |
| C. | Assertion is true but Reason is false |
| D. | Both Assertion and Reason are false |
| Answer» B. Both Assertion and Reason are true and Reason is not the correct explanation of Assertion | |
| 77. |
Assertion NaOH cannot be stored in a vessel made of aluminium or zinc. Reason A protective layer of oixde is formed on the surface of the metal. |
| A. | Both Assertion and Reason are true and Reason is the correct explanation of Assertion |
| B. | Both Assertion and Reason are true and Reason is not the correct explanation of Assertion |
| C. | Assertion is true but Reason is false |
| D. | Both Assertion and Reason are false |
| Answer» D. Both Assertion and Reason are false | |
| 78. |
Assertion A catalyst does not influence the value of equilibrium constant. Reason Catalyst influence the rate of both forward and backward reactions equally. |
| A. | Both Assertion and Reason are true and Reason is the correct explanation of Assertion |
| B. | Both Assertion and Reason are true and Reason is not the correct explanation of Assertion |
| C. | Assertion is true but Reason is false |
| D. | Both Assertion and Reason are false |
| Answer» B. Both Assertion and Reason are true and Reason is not the correct explanation of Assertion | |
| 79. |
Assertion Energy of electron is largely determined by its principal quantum number. Reason Principal quantum number is a measure of the most possible distance of finding the electron around the nucleus. |
| A. | Both Assertion and Reason are true and Reason is the correct explanation of Assertion |
| B. | Both Assertion and Reason are true and Reason is not the correct explanation of Assertion |
| C. | Assertion is true but Reason is false |
| D. | Both Assertion and Reason are false |
| Answer» B. Both Assertion and Reason are true and Reason is not the correct explanation of Assertion | |
| 80. |
Assertion Both 106 g of sodium carbonate and 12 g of graphite have same number of carbon atoms. Reason Both 106 g sodium carbonate and 12 g of graphite contain 1 g-atom of carbon atoms. |
| A. | Both Assertion and Reason are true and Reason is the correct explanation of Assertion |
| B. | Both Assertion and Reason are true and Reason is not the correct explanation of Assertion |
| C. | Assertion is true but Reason is false |
| D. | Both Assertion and Reason are false |
| Answer» B. Both Assertion and Reason are true and Reason is not the correct explanation of Assertion | |
| 81. |
Assertion Treatment of chloroethane with a saturated solution of AgCN gives ethyl isocyanide as the major product. Reason Cyanide (CN−) is an ambident nucelophile. |
| A. | Both Assertion and Reason are true and Reason is the correct explanation of Assertion |
| B. | Both Assertion and Reason are true and Reason is not the correct explanation of Assertion |
| C. | Assertion is true but Reason is false |
| D. | Both Assertion and Reason are false |
| Answer» C. Assertion is true but Reason is false | |
| 82. |
Assertion p-toluidine is a stronger base than m-toluene. Reason Methyl group from m-position exerts smaller electron donating inductive (+I) effect than from p-position. |
| A. | Both Assertion and Reason are true and Reason is the correct explanation of Assertion |
| B. | Both Assertion and Reason are true and Reason is not the correct explanation of Assertion |
| C. | Assertion is true but Reason is false |
| D. | Both Assertion and Reason are false |
| Answer» D. Both Assertion and Reason are false | |
| 83. |
Assertion Conformers are impractical to separate. Reason Conformers have negligibly small difference in their potential energy. |
| A. | Both Assertion and Reason are true and Reason is the correct explanation of Assertion |
| B. | Both Assertion and Reason are true and Reason is not the correct explanation of Assertion |
| C. | Assertion is true but Reason is false |
| D. | Both Assertion and Reason are false |
| Answer» B. Both Assertion and Reason are true and Reason is not the correct explanation of Assertion | |
| 84. |
If the IP of Na is 5.48 eV, the ionsation potential of K will be |
| A. | same as that of Na |
| B. | 4.4 eV |
| C. | 5.68 eV |
| D. | 10.88 eV |
| Answer» C. 5.68 eV | |
| 85. |
The period number in the long form of the periodic table is equal to |
| A. | magnetic quantum number of any element of the period |
| B. | atomic number of any element of the period |
| C. | maximum principal quantum number of any element of the period |
| D. | maximum azimuthal quantum numbers of any element of the period |
| Answer» D. maximum azimuthal quantum numbers of any element of the period | |
| 86. |
Which of the following is not an actinoid? |
| A. | Curium (Z = 96) |
| B. | Californium (Z = 98) |
| C. | Uranium(Z = 92) |
| D. | Terbium (Z = 65) |
| Answer» E. | |
| 87. |
Which one of the following is a conjugated protein? |
| A. | Phosphoprotein |
| B. | Glycoprotein |
| C. | Chromoprotein |
| D. | All of these |
| Answer» E. | |
| 88. |
Strongest conjugate base is |
| A. | Cl− |
| B. | Br− |
| C. | F− |
| D. | I− |
| Answer» D. I− | |
| 89. |
An LPG cylinder, containing 15 kg butane at 27℃ and 10 atm pressure, is leaking. After one day, its pressure decreased to 8 atm. The quantity of gas leaked is |
| A. | 1 kg |
| B. | 2 kg |
| C. | 3 kg |
| D. | 4 kg |
| Answer» D. 4 kg | |
| 90. |
An organic compound which produces a bluish green coloured flame on heating in presence of copper is |
| A. | chlorobenzene |
| B. | benzaldehyde |
| C. | aniline |
| D. | benzoic acid |
| Answer» B. benzaldehyde | |
| 91. |
The stability of ferric ion is due to |
| A. | half-filled d-orbitals |
| B. | half-filled f-orbitals |
| C. | completely filled d-orbitals |
| D. | completely filled f-orbitals1 |
| Answer» B. half-filled f-orbitals | |
| 92. |
Europium is |
| A. | s- block element |
| B. | p- block element |
| C. | d- block element |
| D. | f- block element |
| Answer» E. | |
| 93. |
In electrorefining of copper some gold is deposited at |
| A. | cathode |
| B. | anode mud |
| C. | cathode mud |
| D. | electrode |
| Answer» C. cathode mud | |
| 94. |
An increase in equivalence conductance of a strong electrolyte with dilution is mainly due to |
| A. | increase in number of ions |
| B. | increase in ionic mobility of ions |
| C. | increase in both, i.e., number of ions and ionic mobility of ions |
| D. | at normal dilution 100% ionization of electrolyte |
| Answer» C. increase in both, i.e., number of ions and ionic mobility of ions | |
| 95. |
Assertion There is no current in the metals in the absence of electric field. Reason Motion of free electrons are randomly. |
| A. | If both the assertion and reason are true and reason explains the assertion. |
| B. | If both the assertion and reason are true and reason explains the assertion. |
| C. | If assertion is true but reason false |
| D. | If assertion is false but reason is true |
| Answer» B. If both the assertion and reason are true and reason explains the assertion. | |
| 96. |
Assertion Displacement of a body may be zero, when distance travelled by it is not zero. Reason The displacement is the longer distance between initial and final position. |
| A. | If both the assertion and reason are true and reason explains the assertion. |
| B. | If both the assertion and reason are true but reason does not explain the assertion. |
| C. | If assertion is true but reason false |
| D. | If assertion is false but reason is true |
| Answer» D. If assertion is false but reason is true | |
| 97. |
Assertion For higher temperature, the peak emission wavelength of a black body shifts to lower wavelength. Reason Peak emission wavelength of a black body is proportional to the fourth power of temperature. |
| A. | If both the assertion and reason are true and reason explains the assertion. |
| B. | If both the assertion and reason are true but reason does not explain the assertion. |
| C. | If assertion is true but reason false |
| D. | If assertion is true but reason True |
| Answer» E. | |
| 98. |
Assertion Thermodynamic process in nature are irreversible. Reason Dissipative effects cannot be eliminated. |
| A. | If both the assertion and reason are true and reason explains the assertion. |
| B. | If both the assertion and reason are true but reason does not explain the assertion. |
| C. | If assertion is true but reason false |
| D. | If assertion is false but reason is true |
| Answer» D. If assertion is false but reason is true | |
| 99. |
Assertion A transistor amplifier in common emitter configuration has a low input impedance. Reason The base to emitter region is forward biased. |
| A. | If both the assertion and reason are true and reason explains the assertion. |
| B. | If both the assertion and reason are true but reason does not explain the assertion. |
| C. | If assertion is true but reason false |
| D. | If assertion is false but reason is true |
| Answer» C. If assertion is true but reason false | |
| 100. |
Assertion In He-Ne laser, population inversion takes place between energy levels of neon atoms. Reason The base to emitter region is forward biased. |
| A. | If both the assertion and reason are true and reason explains the assertion. |
| B. | If both the assertion and reason are true but reason does not explain the assertion. |
| C. | If assertion is true but reason false |
| D. | If assertion is false but reason is true |
| Answer» C. If assertion is true but reason false | |